Factors affecting enzyme action (cognito)

    Cards (15)

    • What factors affect the functioning of enzymes?
      Temperature and pH
    • How does temperature affect the rate of enzyme-controlled reactions?
      Higher temperature increases reaction rate initially
    • Why does the rate of reaction increase with temperature?
      Particles have more kinetic energy and collide more
    • What happens to the rate of reaction after 37°C?
      The rate starts to drop rapidly
    • Why does the rate of reaction drop after high temperatures?
      High temperatures break bonds in enzymes
    • At what temperature does enzyme denaturation occur?
      Around 45°C
    • What is the optimum temperature for enzymes?
      The temperature at which reaction rate is highest
    • What is the optimum temperature for most enzymes in the body?
      37°C
    • How does pH affect enzyme activity?
      Extreme pH levels lower the reaction rate
    • What happens to the enzyme's active site when pH changes?
      It changes shape, affecting substrate binding
    • What is the optimal pH for most enzymes in the body?
      Around pH 7 (neutral)
    • What is the optimal pH for enzymes in the stomach?
      Around pH 2
    • What are the effects of temperature and pH on enzymes?
      • Temperature increases reaction rate until denaturation
      • Optimal temperature is around 37°C for most enzymes
      • pH affects reaction rate; extreme pH can denature enzymes
      • Optimal pH is around 7 for most enzymes, 2 for stomach enzymes
    • What is the term for when an enzyme can no longer catalyze a reaction?
      Denatured
    • What happens to the substrate when the enzyme is denatured?
      The substrate can no longer fit into the active site